When electromagnetic radiation falls on a surface, then the angle between reflected light and refracted light is 90 deg at an angle, called:
Correct answer: C. Brewster's angle
- A. Critical angle
- B. At any angle, both rays are perpendicular
- C. Brewster's angle
- D. Inclination angle
Explanation
Brewster's angle is the angle of incidence at which the reflected and refracted rays are perpendicular to each other. This angle occurs when light is incident on a surface at a specific angle such that the reflected light becomes completely polarized and the refracted light is purely transmitted.
This question appeared on the KMU Centralized Admission Test 2021 paper, which you can sit online with every answer explained.
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Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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